Cognizant Programme Analyst interview questions

He asked me about swapping of two numbers without using third variables,about pointers,and first 50 prime numbers to which i answered all of them correctly. Then he asked me where do i stay about my family and i got to know he knows my family and belongs to the same locality. I was actually happy to hear that but who knew after that your own people stabs at your back which i found out later he wasnt in good terms with our family and thud rejected me after answering all my questions.

It was lengthy process. Hr sent me a call letter for an interview. First round is Face to Face round. Followed by 2nd technical with Another person. Then will sent to HR.